Re: [PATCH v2 4/4] mm: swap: Count successful mTHP ZSWAP stores in sysfs mTHP stats.

[kernel test robot <lkp@intel.com>]

Hi Kanchana,

kernel test robot noticed the following build errors:

[auto build test ERROR on linus/master]
[also build test ERROR on v6.11-rc3]
[cannot apply to akpm-mm/mm-everything next-20240816]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Kanchana-P-Sridhar/mm-zswap-zswap_is_folio_same_filled-takes-an-index-in-the-folio/20240816-134948
base:   linus/master
patch link:    https://lore.kernel.org/r/20240816054805.5201-5-kanchana.p.sridhar%40intel.com
patch subject: [PATCH v2 4/4] mm: swap: Count successful mTHP ZSWAP stores in sysfs mTHP stats.
config: arm-randconfig-002-20240816 (https://download.01.org/0day-ci/archive/20240817/202408170059.sq8QoVWB-lkp@intel.com/config)
compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project 26670e7fa4f032a019d23d56c6a02926e854e8af)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240817/202408170059.sq8QoVWB-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202408170059.sq8QoVWB-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from mm/page_io.c:14:
   In file included from include/linux/mm.h:2228:
   include/linux/vmstat.h:514:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     514 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
>> mm/page_io.c:178:3: error: call to undeclared function 'count_mthp_stat'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     178 |                 count_mthp_stat(folio_order(folio), MTHP_STAT_ZSWPOUT);
         |                 ^
>> mm/page_io.c:178:39: error: use of undeclared identifier 'MTHP_STAT_ZSWPOUT'
     178 |                 count_mthp_stat(folio_order(folio), MTHP_STAT_ZSWPOUT);
         |                                                     ^
   1 warning and 2 errors generated.


vim +/count_mthp_stat +178 mm/page_io.c

   174	
   175	static inline void count_mthp_zswpout_vm_event(struct folio *folio)
   176	{
   177		if (IS_ENABLED(CONFIG_THP_SWAP))
 > 178			count_mthp_stat(folio_order(folio), MTHP_STAT_ZSWPOUT);
   179	}
   180	

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